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初中优培班周末学习计划

初中优培班周末学习计划

初中优培班周末学习计划周末对于许多初中生来说,是一个放松和娱乐的时间。

但对于参加优培班的学生来说,周末也是一个提高学习能力和提高成绩的好时机。

在这篇文章中,我们将介绍一份初中优培班周末学习计划,希望能帮助学生更好地利用周末时间,提高学习成绩。

周六上午:8:00-9:00早起锻炼身体在周末的早晨,学生应该早起锻炼身体,可以选择跑步、打篮球、或者是做一些简单的晨间体操。

锻炼身体可以增强体魄,提高学习效率。

周六上午:9:00-11:00阅读和背诵在上午的这段时间里,学生可以选择一本好书进行阅读,并背诵一些好的诗歌或者文章。

阅读可以帮助学生开阔视野,提高写作和表达能力,背诵可以锻炼学生的记忆力。

周六上午:11:00-12:00午餐和休息午餐后,学生可以休息片刻,放松一下身心,为下午的学习做好充足的准备。

周六下午:1:00-3:00语文学习下午的这段时间可以用来学习语文,包括课文和作文。

学生可以选择一些经典的课文进行阅读,并做一些相关的习题。

同时,学生也可以选择一个话题进行写作练习,提高写作水平。

周六下午:3:00-5:00数学学习在数学学习的时间里,学生可以选择一些重要的知识点进行复习,做一些相关的练习题。

数学是一个需要不断练习的学科,只有通过不断地练习和思考,才能掌握好数学知识。

周六晚上:6:00-7:00晚餐和休息晚餐后,学生可以放松一下,可以选择一些轻松的活动,比如看电视、听音乐等,让自己放松一下,为之后的学习做好心理准备。

英语学习晚上的时间可以用来学习英语,学生可以选择一些经典的英文文章进行翻译,并做一些相关的练习题。

同时,学生也可以选择一些英语电影或者音乐来进行学习,提高自己的听力和口语能力。

周日上午:8:00-9:00早起锻炼身体周日早晨也是一个锻炼身体的好时机,学生可以选择里一样的方式进行锻炼。

周日上午:9:00-11:00文化课复习在上午的时间里,学生可以选择一些重要的知识点进行复习,包括语文、数学、英语等文化课的知识点,可以做一些相关的模拟试题。

江苏名校六年级上册第一周数学周末培优练习及答案

江苏名校六年级上册第一周数学周末培优练习及答案

江苏名校六年级上册第一周数学周末培优练习(满分:100分时间:80分钟)一、填空。

(每空1分,共27分)1.一个长方体纸箱长、宽、高分别为0.5m 、0.4m和0.3m,那么这个纸箱最大面的面积是( )m2,最小面的面积是( )m2,它的表面积是( )m2。

2.把右图折叠起来,可以围成一个( )。

这时( )号面和( )号面相对;( )号面和( )号面相对;( )号面和( )号面相对。

3.用两个长3 cm、宽3 cm、高1 cm的长方体拼成一个大长方体,这个大长方体的表面积最大是( )cm2,最小是( )cm2。

4.一个正方体的棱长和是84分米,它的棱长是( )分米,表面积是( )平方分米。

5.把2个棱长是1cm的正方体拼成一个长方体,这个长方体的表面积是( )cm2。

6.一个正方体的底面周长是16cm,这个正方体的表面积是( )cm 2。

7.把4个棱长4厘米的正方体拼成一个长方体,表面积比原来最多减少()平方厘米。

最少减少()平方厘米。

8.写出下表中物体的形状是正方体还是长方体,再求表面积和棱长总和。

二、选择。

(每题2分,共10分)1.下列图形是正方体的展开图的是( )。

2.挖一个长8 m、宽6 m 、深4.5 m的长方体水池,这个水池的占地面积是( )m2。

A.48B.44C.27D.363.如图,从一个较大的长方体上挖掉一个小正方体,现在它的表面积( )A.和原来一样大B.比原来大C.比原来小D.无法确定4.正方体的棱长扩大到原来的3倍,它的表面积就扩大到原来的( )倍。

A.3B.6C.95.把两个正方体分别用包装纸包装起来,比把两个正方体一起包装所用的包装纸( )。

A.多B.少C.一样多三、操作。

(共9分)1.在方格纸上画出长方体表面展开图的另外三个面,并标上相应名称。

(5分)2.在下面的若干个面中找出6个面,使它们能围成一个长方体,这6个面的编号分别是( )。

(4分)四、解决问题。

(每题6分,共54分)1.用两个完全一样的正方体拼成一个长方体,棱长之和减少了32 cm。

2024年部编版七年级上册语文周末复习培优训练试卷及答案 (3)

2024年部编版七年级上册语文周末复习培优训练试卷及答案 (3)

周末提优3第三单元学习任务群:学习生活总分:50 分建议用时:45 分钟得分:基础型学习任务群[荣德原创]为更好地巩固近期所学内容,某班学生分为“现代文小组”和“文言文小组”,对第三单元展开学习。

请你阅读两个小组的成果,完成相关问题。

1. 下面是“现代文小组”制作的口袋书,请你阅读其中几页,完成相关任务。

(9 分)(1)任务一:第1 页中有四个词语存在书写错误,请你在下面写出正确的字形。

(4 分)①___________ ②___________ ③___________ ④___________(2)任务二:第2 页中有两个字的读音标注错误,请你改正。

(2 分)①___________应读作___________ ②___________应读作___________(3)任务三:第3 页中个别词语的归类出现错误,___________应该是名词,___________应该是动词,___________既不是动词也不是名词。

(3 分)2. “文言文小组”研读了《〈论语〉十二章》,邀请你参与,一起完成学习任务。

(11 分)(1)任务一:明义• 理解内容下面句中加点词的解释,有误的一项是(2 分) ( )A. 学而时.习之(按时)B. 传.不习乎(传授,这里指老师传授的知识)C. 三军可夺.帅也(夺取)D. 切.问而近思(恳切)(2)任务二:广识•了解文化下面文学及文化常识,说法错误的一项是(2 分) ( )A. 儒家是先秦诸子百家之一,脱胎自周朝礼乐传统, 代表人物有孔子、老子、孟子、庄子。

B. “箪”,古代盛饭用的圆形竹器, 也有用芦苇等制成的。

C. 文言文中的“水”指的是冷水,“汤”指的是热水。

D. “匹夫”泛指平民百姓,除此之外,平民百姓还可以用“布衣”来代称。

(3)任务三:记言• 书写运用请根据语境进行默写。

(7 分)文学社的同学们想要为外国友人表演一场话剧。

请你依据《〈论语〉十二章》的内容将下面的剧本补充完整。

Unit 1 Topic 2 周末培优作业(二)2024-2025学年仁爱版八年级英语上册

Unit 1 Topic 2 周末培优作业(二)2024-2025学年仁爱版八年级英语上册

2024---2025仁爱版八年级英语上册周末培优作业二(unit 1 topic2 仁爱版)一翻译短语1.举行一场足球比赛_______________________________________2.其中之一________________________________________________3.把某物踢给某人__________________________________________4.把某物传给某人__________________________________________5.没关系_____________________________________6.生病_______________________________________7.帮某人一个忙_______________________________8.擅长_______________________________________9.不断尝试_______________________________________10.斥责某人_______________________________________11.尽某人最大的努力___________________________________12.在某方面做的好_____________________________________13.学会团队合作_______________________________________14.过得开心___________________________________________15.生某人的气_________________________________________16.向某人道歉_________________________________________17.对……感到抱歉_____________________________________18.一定做某事_________________________________________19.把某物给某人_______________________________________20.把某物扔给某人_____________________________________21.给某人买某物_______________________________________22.把某物带给某人_____________________________________23.在一开始,起初________________________________24.形成,产生____________________________________25.两者都……____________________________________26.阻止某人或某物做某事___________________________________27.遵守规则________________________________28.许多,大量______________________________29.全世界__________________________________30.成百上千________________________________二单项选择1.I can’t carry ______ chair by myself. Could you please give me ______ hand?A. a, theB. the, aC.不填,aD. the, 不填2. —I’m sorry for ______I said.—It doesn’t matter.A. whatB. whenC. howD. which3. Michael didn’t pass the ball ______ me. I was really angry ______ him.A. to, withB. to, atC. for, withD. for, about4. ______ your best, _____ you will succeedA. Try, 不填B. Trying, andC. To try, orD. Try, and5. Our school life _______ since 2018.We have more activities outdoors.A. changedB. has changedC. will changeD. changes.6. Li Ping, practice more and you will speak English _________.A. wellB. betterC. moreD. best7.Keep trying! We are __________to pass the exam next time.A. gladB. sorryC. sureD. kind8.I am going to __________for vacation this summer.A. cool somewhereB. somewhere coolC. anywhere coolD. cool anywhere9. A basketball player should have a good skill, _____ it is more important to play _____ a team.A. and, withB. but, asC. though, asD. because, with10.The saying “A tree can’t make a forest” tells us that ______ is very important in a football game.A. skillB. bodyC. teamworkD. speed (速度)11.—I’m sorry for _______ I said.—It doesn’t matter.A. howB. whichC. whatD. when12. —I’d like to read the book over there. Could you pass _______, please?—Certainly. Here you are.A. me itB. it to meC. me for itD. it for me13. —Many new drivers don’t have good _______ for driving. They’re called Road Killers (马路杀手).—You’re right.A. skillB. skillsC. lookD. looks14. The saying A tree can’t make a forest (森林) tells us that _____ is very important in a football match.A. skillB. bodyC. teamworkD. speed(速度)15. —Would you mind _______ us in the game?—Not at all.A.joiningB. joinC. join inD. joining in三完形填空Many people say volleyball is easy. “If you can hit it in the air, you can play volleyball.” I agreed with those people in the past. __1__ now I find it is not really so.I wasn’t good at volleyball at first. But after _2__ hard with my mother, I was sure that I could join my school __3__ and surprise everyone. Playing volleyball wasn’t that easy. When I played with the team, I was unable to work with other players successfully. I felt sad. Isn’tvolleyball just about hitting the __4__? I began a few weeks of training(训练) with the team. Then, we had our first __5__ against Park School. The Park School players were full of experience. However, most of my teammates were not. I could __6__ hope to win.But during the game, I enjoyed the game and felt _7__ working together with my teammates. The sounds of running feet, loud shouts and cheers(欢呼) filled us with warmth. After the game, everyone was excited and __8__ our teamwork.That’s when I started to know that being on the school team meant __9__ together with others. I __10__ how cooperation(合作) is of great importance. Volleyball helped me make friends, learn new things, and find my true self within a group.1.A.But B.And C.Or D.So 2.A.practicing B.talking C.driving D.sitting 3.A.uniform B.team C.class D.homework 4.A.man B.ground C.corner D.ball5.A.hill B.hole C.game D.yard 6.A.hardly B.never C.often D.always 7.A.awful B.terrible C.happy D.alive 8.A.worried about B.heard about C.knew about D.talked about 9.A.living B.working C.writing D.warning 10.A.entered B.cut C.understood D.shook四阅读理解AStreetball is a city game. People play it on playgrounds and in gyms around the world.Usually only one side of the court is used in the streetbal, but the rules of the game are almost the same as basketball games. The number of players in a game may be only 2, and it is called one-to-one. Sometimes there are also two teams of five players each. It is easy for you to join a streetball game. You only need to go to an outdoor court. If there are some teams playing, and they agree to let you take part in, then you have a chance to join any team.Streetball is a very popular game in the world, and it is very popular with the young people. Some cities in the United States even have streetball programs on TV. It is said (据说) that this is a good way for young people to keep away from troubles such as crimes (犯罪) and drugs (毒品). 1.Where do people usually play streetball?A.On the hill.B.In the classroom.C.On playground.D.In the water. 2.The rules of streetball games are almost the same as ___________ games.A.baseball B.football C.volleyball D.basketball 3.What does the underlined word “troubles” mean in Chinese?A.麻烦B.荣誉C.诱惑D.纠缠4.Why do people say the streetball game is good for the young people?A.Because it is very popular.B.Because it can be played by two people.C.Because it can make them strong.D.Because it can keep them from some troubles.5.What can we know from the passage?A.It’s not easy to join a streetball game.B.The streetball game is only for good players.C.The streetball is very popular with young people.D.There are many programs on TV about the streetball game all over the world.BFast walking is the exercise between walking and race walking. A study shows that fast walking has become the most popular exercise in China and many people walk more than 5,000 steps a day. The results of the study are from QQ users. About 37% of the people choose fast walking as their favorite exercise; over 23% choose running and more than 14% choose riding bikes.Fast walking and running are easy, cost little and work well, so they are popular. And many people prefer doing exercise in nature (大自然) than going to gyms. It’s best to walk fast for at least 10 minutes at one time and walk up to 6,000 steps every day.The study also shows that people in Guiyang, Guizhou love sports most. On average (平均), everyone there walks 5,941 steps every day. It seems that people in places with better environment(环境) and air are more willing to (更愿意) do sports.6.Many people in China walk more than ________ steps a day.A.6,000B.5,941C.5,000D.3,7007.Over 23% of the Chinese people choose ________ as their favorite exercise.A.running B.fast walking C.riding bikes D.going to gyms 8.Many people prefer to do exercise ________.A.at home B.on playgrounds C.in the gyms D.in nature9.The writer probably agrees that ________ .A.people living in big cities are more willing to do sportsB.fast walking is not difficult, costs little and works wellC.people in Guiyang, Guizhou love race walking mostD.it’s bad for people to walk fast for more than 10 minutes at a time10.We can read this passage in the column(栏目) ________ of a newspaper.A.Mum’s KitchenB.Music TodayC.Health and SportsD.News TodayCRock climbing(攀岩)did not become a sport until late in the 1900s. But now it has become a popular outdoor activity. While rock climbing may still be necessary for mountain climbing, most people just climb low mountains for fun.If you have ever done rock climbing, you will know that it is not a very easy sport. Indoor and outdoor rock climbing both need practice. Rock climbing is one of the sports that depend on your body and mind. That is to say you need to be strong enough and have courage.To climb successfully, one must use wonderful skills. The most important rule is to always have three parts of your body on the rock face. Another important rule is that your arms only hold you close to the rock face while your legs are pushing you up, the closer you are to the rock face, the easier it is to climb.Rock climbing is a wonderful sport. Once you start to learn how to climb, you’ll find more fun. People who like games such as chess playing or problem-solving may love rock climbing, because they are nearly the same in the way of thinking. For anyone who wants to get into beautiful shape, rock climbing is a fun and good way. Anyone who enjoys a difficult game and loves the outdoors should think of taking rock climbing as a new hobby.11.When did rock climbing become a sport?A.Later in the 1900s.B.Early in the 1900s.C.In the 1900s.D.In the 1900.12.Why may the chess players like rock climbing?A.they'd like to get into beautiful shape.B.it is more interesting than chess playing.C.it is like chess playing in the way of thinking.D.they like the color of the chess.13.What does the underlined word “courage” mean?A.鼓励B.勇气C.体魄D.精彩14.What can we learn from the passage?A.The closer you are to the rock face, the easier it is to climb.B.Rock climbing is a very easy sport.C.When you climb, your arms push you up.D.Rock climbing needs wonderful skills.15.Who can take rock climbing as a new hobby according to the passage?A.The sick people.B.The people who like difficult games.C.Successful people.D.Interesting people.五情景交际。

人教版初2数学8年级下册 第17章(勾股定理)周末培优训练卷(含解析)

人教版初2数学8年级下册 第17章(勾股定理)周末培优训练卷(含解析)

第十七章勾股定理周末培优训练卷1.如图,在四边形ABCD中,∠B=∠D=90°,∠C=60°,AB=5,AD=2.(1)求CD的长;(2)求四边形ABCD的面积.2.如图,在Rt△ABC中,∠C=90°,AC=8,AB=10,AB的垂直平分线分别交AB、AC 于点D、E.求AE的长.3.《九章算术》中有一道“引葭赴岸”问题:“今有池一丈,葭生其中央,出水一尺,引葭赴岸,适与岸齐.问水深,葭长各几何?”题意是:有一个池塘,其底面是边长为10尺的正方形,一棵芦苇AB生长在它的中央,高出水面部分BC为1尺.如果把该芦苇沿与水池边垂直的方向拉向岸边,那么芦苇的顶部B恰好碰到岸边的B'(如图).水深和芦苇长各多少尺?4.如图是一个滑梯示意图,左边是楼梯,右边是滑道,已知滑道AC与AE的长度一样,滑梯的高度BC=4m,BE=1m.求滑道AC的长度.5.如图,△ABC中,∠ABC=90°,AC=25cm,BC=15cm.(1)直接写出AB的长度 .(2)设点P在AB上,若∠PAC=∠PCA.求AP的长;(3)设点M在AC上.若△MBC为等腰三角形,直接写出AM的长.6.如图,在△ABC中,∠ACB=90°,AB=5,BC=3,点P从点A出发,以每秒2个单位长度的速度沿折线A﹣C﹣B﹣A运动.设点P的运动时间为t秒(t>0).(1)求AC的长及斜边AB上的高;(2)①当点P在CB上时,CP的长为 .(用含t的代数式表示)②若点P在∠BAC的角平分线上,则t的值为 .(3)在整个运动中,直接写出△BCP是等腰三角形时t的值.7.如图,公路MN和公路PQ在点P处交汇,且∠QPN=30°,在A处有一所中学,AP=120米,此时有一辆消防车在公路MN上沿PN方向以每秒5米的速度行驶,假设消防车行驶时周围100米以内有噪音影响.(1)学校是否会受到影响?请说明理由.(2)如果受到影响,则影响时间是多长?8.一块钢板形状如图所示,量得AB=3,BC=4,AC=5,CD=12,AD=13,请你计算一下这块钢板的面积.9.我们新定义一种三角形:两边平方和等于第三边平方的4倍的三角形叫做常态三角形.例如:某三角形三边长分别是5,6和8,因为62+82=4×52=100,所以这个三角形是常态三角形.(1)若△ABC三边长分别是2,和4,则此三角形 常态三角形(填“是”或“不是”);(2)若Rt△ABC是常态三角形,则此三角形的三边长之比为 (请按从小到大排列);(3)如图,Rt△ABC中,∠ACB=90°,BC=6,点D为AB的中点,连接CD,若△BCD 是常态三角形,求△ABC的面积.10.如图,已知在△ABC中,CD⊥AB于D,BD=9,BC=15,AC=20.(1)求CD的长;(2)求AB的长;(3)判断△ABC的形状.11.定义:如图,点M、N把线段AB分割成AM、MN、NB,若以AM、MN、NB为边的三角形是一个直角三角形,则称点M、N是线段AB的勾股分割点.(1)已知M、N把线段AB分割成AM、MN、NB,若AM=2,MN=4,BN=2,则点M、N是线段AB的勾股分割点吗?请说明理由.(2)已知点M、N是线段AB的勾股分割点,且AM为直角边,若AB=12,AM=5,求BN的长.12.如图,Rt△ACB在直线l上,且∠ABC=90°,BC=6cm,AC=10cm.(1)求AB的长.(2)若有一动点P从点B出发,以2cm/s的速度在直线l上运动,则当t为何值时,△ACP 为等腰三角形?13.如图,已知△ABC中,∠B=90°,AB=16cm,BC=12cm,P、Q是△ABC边上的两个动点,其中点P从点A开始沿A→B方向运动,且速度为每秒1cm,点Q从点B开始沿B→C→A方向运动,且速度为每秒2cm,它们同时出发,设出发的时间为t秒.(1)出发2秒后,求PQ的长;(2)当点Q在边BC上运动时,出发几秒钟后,△PQB能形成等腰三角形?(3)当点Q在边CA上运动时,求能使△BCQ成为等腰三角形的运动时间.14.如图,在一棵树CD的6m高处B有两只猴子,其中一只猴子爬下树走到离树12m处的池塘的A处,另一只爬到树顶D后直接跃到A处,距离以直线计算,如果两只猴子所经过的距离相等,请问这棵树有多高?15.如图,这是一个供滑板爱好者使用的U型池,该U型池可以看作是一个长方体去掉一个“半圆柱”而成,中间可供滑行部分的截面是半径为4m的半圆,其边缘AB=CD=20m,点E在CD上,CE=2m,一滑行爱好者从A点到E点,则他滑行的最短距离是多少?(边缘部分的厚度可以忽略不计,结果取整数)16.如图是盼盼家新装修的房子,期中三个房间甲、乙、丙,他将一个梯子斜靠在墙上,梯子顶端距离地面的垂直距离记作MA,如果梯子的底端P不动,顶端靠在对面墙上,此时梯子的顶端距离地面的垂直距离记作NB.(1)当盼盼在甲房间时,梯子靠在对面墙上,顶端刚好落在对面墙角B处,若MA=1.6米,AP=1.2米,则甲房间的宽度AB= 米.(2)当他在乙房间时,测得MA=2.4米,MP=2.5米,且∠MPN=90°,求乙房间的宽AB;17.阅读下列内容:设a,b,c是一个三角形的三条边的长,且a是最长边,我们可以利用a,b,c三边长间的关系来判断这个三角形的形状:①若a2=b2+c2,则该三角形是直角三角形;②若a2>b2+c2,则该三角形是钝角三角形;③a2<b2+c2,则该三角形是锐角三角形.例如一个三角形的三边长分别是4,5,6,则最长边是6,由于62=36<42+52,故由上面③可知该三角形是锐角三角形,请解答以下问题:(1)若一个三角形的三条边长分别是2,3,4,则该三角形是 三角形.(2)若一个三角形的三条边长分别是3,4,x,且这个三角形是直角三角形,则x的值为 .(3)若一个三角形的三条边长a=,b=,c=,其中a是最长边,请判断这个三角形的形状,并写出你的判断过程.18.如图所示的一块地,∠ADC=90°,AD=4m,CD=3m,AB=13m,BC=12m,求这块地的面积.19.以3,4,5为边长的三角形是直角三角形,称3,4,5为勾股数组,记为(3,4,5),类似地,还可得到下列勾股数组:(8,6,10),(15,8,17),(24,10,26)等.(1)根据上述四组勾股数的规律,写出第六组勾股数;(2)用含n(n≥2且n为整数)的数学等式描述上述勾股数组的规律,并证明.20.“今有邑,东西七里,南北九里,各开中门,出东门一十五里有木,问:出南门几何步而见木?”这段话摘自《九章算术》,意思是说:如图,矩形城池ABCD,东边城墙AB 长9里,南边城墙AD长7里,东门点E,南门点F分别是AB、AD的中点,EG⊥AB,FH⊥AD,EG=15里,HG经过点A,问FH多少里?21.(1)如图1,等腰三角形ABC中,AB=AC,点D是BC的中点,DE⊥AB于点E、DF⊥AC于点F.求证:DE=DF;(2)如图2,等腰三角形ABC中,AB=AC=13,BC=10,点D是BC边上的动点,DE ⊥AB于点E、DF⊥AC于点F.请问DE+DF的值是否随点D位置的变化而变化?若不变,请直接写出DE+DF的值;若变化,请说明理由.22.善于思考的小鑫同学,在一次数学活动中,将一副直角三角板如图放置,A,B,D在同一直线上,且EF∥AD,∠BAC=∠EDF=90°,∠C=45°,∠E=60°,量得DE=12cm,求BD的长.23.如图,在Rt△ABC中,∠ABC=90°,AB=8,BC=6,点D为AC边上的动点,点D 从点C出发,沿边CA向点A运动,当运动到点A时停止,若设点D运动的时间为t 秒.点D运动的速度为每秒1个单位长度.(1)当t=2时,CD= ,AD= ;(2)求当t为何值时,△CBD是直角三角形,说明理由;(3)求当t为何值时,△CBD是以BD或CD为底的等腰三角形?并说明理由.24.观察、思考与验证(1)如图1是一个重要公式的几何解释,请你写出这个公式 ;(2)如图2所示,∠B=∠D=90°,且B,C,D在同一直线上.试说明:∠ACE=90°;(3)伽菲尔德(1881年任美国第20届总统)利用(1)中的公式和图2证明了勾股定理(发表在1876年4月1日的《新英格兰教育日志》上),请你写出验证过程.25.在△ABC中,AB、BC、AC三边的长分别为、、,求这个三角形的面积.小华同学在解答这道题时,先画一个正方形网格(每个小正方形的边长为1),再在网格中画出格点△ABC(即△ABC三个顶点都在小正方形的顶点处),如图1所示.这样不需求△ABC的高,而借用网格就能计算出它的面积.这种方法叫做构图法.(1)△ABC的面积为: .(2)若△DEF三边的长分别为、、,请在图2的正方形网格中画出相应的△DEF,并利用构图法求出它的面积.26.如图,∠AOB=90°,OA=9cm,OB=3cm,一机器人在点B处看见一个小球从点A 出发沿着AO方向匀速滚向点O,机器人立即从点B出发,沿BC方向匀速前进拦截小球,恰好在点C处截住了小球.如果小球滚动的速度与机器人行走的速度相等,那么机器人行走的路程BC是多少?27.在一次“构造勾股数”的探究性学习中,老师给出了下表:m 2 3 3 4…n1123…a22+1232+1232+2242+32…b4 6 1224 …c22﹣1232﹣1232﹣2242﹣32…其中m、n为正整数,且m>n.(1)观察表格,当m=2,n=1时,此时对应的a、b、c的值能否为直角三角形三边的长?说明你的理由.(2)探究a,b,c与m、n之间的关系并用含m、n的代数式表示:a= ,b= ,c= .(3)以a,b,c为边长的三角形是否一定为直角三角形?如果是,请说明理由;如果不是,请举出反例.28.小红同学要测量A、C两地的距离,但A、C之间有一水池,不能直接测量,于是她在A、C同一水平面上选取了一点B,点B可直接到达A、C两地.她测量得到AB=80米,BC=20米,∠ABC=120°.请你帮助小红同学求出A、C两点之间的距离.(参考数据≈4.6)29.如图(1),是两个全等的直角三角形(直角边分别为a,b,斜边为c).(1)用这样的两个三角形构造成如图(2)的图形(B,E,C三点在一条直线上),利用这个图形,求证:a2+b2=c2(2)当a=1,b=2时,将其中一个直角三角形放入平面直角坐标系中(如图(3)),使直角顶点与原点重合,两直角边a,b分别与x轴、y轴重合.①请在坐标轴上找一点C,使△ABC为等腰三角形.写出一个满足条件的在x轴上的点的坐标: ;写出一个满足条件的在y轴上的点的坐标: ,这样的点有 个.30.我们给出如下定义:若一个四边形中存在相邻两边的平方和等于一条对角线的平方,则称这个四边形为勾股四边形,这两条相邻的边称为这个四边形的勾股边.(1)写出你所知道的四边形中是勾股四边形的两种图形的名称 , ;(2)如图,将△ABC绕顶点B按顺时针方向旋转60°后得到△DBE,连接AD、DC,若∠DCB=30°,试证明;DC2+BC2=AC2.(即四边形ABCD是勾股四边形)31.先阅读下列一段文字,再回答问题:已知平面内两点P1(x1,y1)、P2(x2,y2),这两点间的距离P1P2=.同时当两点所在的直线在坐标轴上或平行于坐标轴或垂直于坐标轴时,两点间的距离公式可简化为|x2﹣x1|或|y2﹣y1|.(1)已知点A(2,3)、B(4,2),试求A、B两点间的距离;(2)已知点A、B在平行于x轴的直线上,点A的横坐标为7,点B的横坐标为5,试求A、B两点间的距离;(3)已知一个三角形的各顶点坐标为A(﹣2,1)、B(1,4)、C(1﹣a,5),试用含a 的式子表示△ABC的面积.32.某地要开发一块三角形植物园,如图,测得AC=80cm,BC=60cm,AB=100cm.(1)若入口E在边AB上,且AB=2BE,求从入口E到出口C的最短路线的长;(2)在第一问的条件下,若线段CD是一条水渠,且点D在边AB上,CD=CE,请直接写出DE的长度.33.如图,在△ABC中,AB=3,AC=4,BC=5,P为边BC上一动点,PE⊥AB于E,PF ⊥AC于F,M为EF中点,求AM的最小值.34.学了勾股定理后,刘老师给学生布置了一道题:如图△ABC中,∠B=45°,∠BAC=75°,AB=,求BC的长.有些同学认为△ABC不是直角三角形,求不出BC的长,老师让学生小组合作,经过讨论形成共识:可以通过作垂直构建直角三角形求解.请你结合他们的思路完成这一问题.35.如图,在四边形ABCD中,AB∥CD,∠D=90°,若AD=3,AB=4,CD=8,点P 为线段CD上的一动点,若△ABP为等腰三角形,求DP的长.36.如图,已知在Rt△ABC中,∠ACB=90°,AC=8,BC=16,D是AC上的一点,CD=3,点P从B点出发沿射线BC方向以每秒2个单位的速度向右运动.设点P的运动时间为t.连接AP.(1)当t=3秒时,求AP的长度(结果保留根号);(2)当△ABP为等腰三角形时,求t的值;(3)过点D作DE⊥AP于点E.在点P的运动过程中,当t为何值时,能使DE=CD?37.数学实验室:制作4张全等的直角三角形纸片(如图1),把这4张纸片拼成以弦长c 为边长的正方形构成“弦图”(如图2),古代数学家利用“弦图”验证了勾股定理.探索研究:(1)小明将“弦图”中的2个三角形进行了旋转,得到图3,请利用图3证明勾股定理;数学思考:(2)小芳认为用其它的方法改变“弦图”中某些三角形的位置,也可以证明勾股定理.请你想一种方法支持她的观点(先在备用图中补全图形,再予以证明).38.已知:如图,有一块Rt△ABC的绿地,量得两直角边AC=8m,BC=6m.现在要将这块绿地扩充成等腰△ABD,且扩充部分(△ADC)是以8m为直角边长的直角三角形,求扩充后等腰△ABD的周长.(1)在图1中,当AB=AD=10m时,△ABD的周长为 ;(2)在图2中,当BA=BD=10m时,△ABD的周长为 ;(3)在图3中,当DA=DB时,求△ABD的周长.参考答案1.解:(1)延长BA、CD交于点H,如图所示:∵∠B=∠ADC=90°,∠C=60°,∴∠ADH=90°,∠H=30°,∴HA=2AD=4,CH=2BC,∴DH===2,BH=HA+AB=4+5=9,∵BH===BC=9,∴BC=3,∴CH=2BC=6,∴CD=CH﹣HD=6﹣2=4;(2)四边形ABCD的面积=△BCH的面积﹣△ADH的面积=×3×9﹣×2×2=.2.解:在Rt△ABC中,∠C=90°,AC=8,AB=10,∴BC===6,连接BE,∵DE垂直平分AB,∴AE=BE,设AE=BE=x,则CE=8﹣x,在Rt△BCE中,∵BC2+CE2=BE2,∴62+(8﹣x)2=x2,解得x=,∴AE=.3.解:设水深x尺,则芦苇长(x+1)尺.由题意得x2+52=(x+1)2.解得x=12.∴x+1=13.答:水深12尺;芦苇长13尺.4.解:设AC=xm,则AE=AC=xm,AB=AE﹣BE=(x﹣1)m,由题意得:∠ABC=90°,在Rt△ABC中,AB2+BC2=AC2(x﹣1)2+42=x2解得x=8.5∴AC=8.5m.5.解:(1)∵∠ABC=90°,AC=25cm,BC=15cm,∴AB===20(cm),故答案为:20cm;(2)∵∠PAC=∠PCA,∴AP=PC,设AP=PC=x,∴PB=20﹣x,∵∠B=90°,∴BP2+BC2=CP2,即(20﹣x)2+152=x2,解得:x=,∴AP=;(3)AM的长为10cm,7cm,12.5cm.如图(1),当CB=CM=15时,AM=AC﹣CM=25﹣15=10(cm);如图(2),当BM=CM时,AM=BM=CM=AC=12.5(cm);如图(3),当BC=BM时,过B作BH⊥AC于点H,则BH==12(cm),CH==9(cm),∴CM=2CH=18(cm),∴AM=AC﹣CM=7(cm);综上所述,AM的长为10cm,7cm,12.5cm.6.解:(1)在△ABC中,∠ACB=90°,AB=5,BC=3,由勾股定理得:AC=4.设斜边AB上的高为h,∵AB•h=AC•BC,∴5h=3×4,∴h=2.4.∴AC的长为4,斜边AB上的高为2.4;(2)已知点P从点A出发,以每秒2个单位长度的速度沿折线A﹣C﹣B﹣A运动,①当点P在CB上时,点P运动的长度为:AC+CP=2t,∵AC=4,∴CP=2t﹣AC=2t﹣4.故答案为:2t﹣4.②当点P'在∠BAC的角平分线上时,过点P'作P'D⊥AB,如图:∵AP'平分∠BAC,P'C⊥AC,P'D⊥AB,∴P'D=P'C=2t﹣4,∵BC=3,∴BP'=3﹣(2t﹣4)=7﹣2t,在Rt△ACP'和Rt△ADP'中,,∴Rt△ACP'≌Rt△ADP'(HL),∴AD=AC=4,又∵AB=5,∴BD=1,在Rt△BDP'中,由勾股定理得:12+(2t﹣4)2=(7﹣2t)2,解得:t=.故答案为:.(3)由图可知,当△BCP是等腰三角形时,点P必在线段AC或线段AB上,①当点P在线段AC上时,此时△BCP是等腰直角三角形,∴此时CP=BC=3,∴AP=AC﹣CP=4﹣3=1,∴2t=1,∴t=0.5;②当点P在线段AC上时,若BC=BP,则点P运动的长度为:AC+BC+BP=4+3+3=10,∴2t=10,∴t=5;若PC=BC,如图2,过点C作CH⊥AB于点H,则BP=2BH,在△ABC中,∠ACB=90°,AB=5,BC=3,AC=4,∴AB•CH=AC•BC,∴5CH=4×3,∴CH=,在Rt△BCH中,由勾股定理得:BH==1.8,∴BP=3.6,∴点P运动的长度为:AC+BC+BP=4+3+3.6=10.6,∴2t=10.6,∴t=5.3;若PC=PB,如图3所示,过点P作PQ⊥BC于点Q,则BQ=CQ=0.5×BC=,∠PQB=90°,∴∠ACB=∠PQB=90°,∴PQ∥AC,∴PQ为△ABC的中位线,∴PQ=0.5×AC=0.5×4=2,在Rt△BPQ中,由勾股定理得:BP==2.5,点P运动的长度为:AC+BC+BP=4+3+2.5=9.5,∴2t=9.5,∴t=4.75.综上,t的值为0.5或4.75或5或5.3.7.解:(1)学校受到噪音影响.理由如下:作AB⊥MN于B,如图1,∵PA=120m,∠QPN=30°,∴AB=PA=60m,而60m<100m,∴消防车在公路MN上沿PN方向行驶时,学校受到噪音影响;(2)以点A为圆心,100m为半径作⊙A交MN于C、D,如图,∵AB⊥CD,∴CB=BD,在Rt△ABC中,AC=100m,AB=60m,CB==80m,∴CD=2BC=160m,∵消防车的速度5m/s,∴消防车在线段CD上行驶所需要的时间=160÷5=32(秒),∴学校受影响的时间为32秒.8.解:∵42+32=52,52+122=132,即AB2+BC2=AC2,故∠B=90°,同理,∠ACD=90°,∴S四边形ABCD=S△ABC+S△ACD=×3×4+×5×12=6+30=36.9.解:(1)∵22+42=4×()2=20,∴△ABC三边长分别是2,和4,则此三角形是常态三角形.故答案为:是;(2)∵Rt△ABC是常态三角形,∴设两直角边长为:a,b,斜边长为:c,则a2+b2=c2,a2+c2=4b2,则2a2=3b2,故a:b=:,∴设a=x,b=x,则c=x,∴此三角形的三边长之比为:::.故答案为:::;(3)∵Rt△ABC中,∠ACB=90°,BC=6,点D为AB的中点,△BCD是常态三角形,∴当AD=BD=DC,CD2+BD2=4×62时,解得:BD=DC=6,则AB=12,故AC==6,则△ABC的面积为:×6×6=.当AD=BD=DC,CD2+BC2=4×BD2时,解得:BD=DC=2,则AB=4,故AC=2,则△ABC的面积为:×6×2=6.故△ABC的面积为或6.10.解:(1)在△BCD中,因为CD⊥AB,所以BD2+CD2=BC2.所以CD2=BC2﹣BD2=152﹣92=144.所以CD=12.(2)在△ACD中,因为CD⊥AB,所以CD2+AD2=AC2.所以AD2=AC2﹣CD2=202﹣122=256.所以AD=16.所以AB=AD+BD=16+9=25.(3)因为BC2+AC2=152+202=625,AB2=252=625,所以AB2=BC2+AC2.所以△ABC是直角三角形.11.解:(1)是.理由:∵AM2+BN2=22+(2)2=16,MN2=42=16,∴AM2+NB2=MN2,∴AM、MN、NB为边的三角形是一个直角三角形.故答案为是.(2)设BN=x,则MN=12﹣AM﹣BN=7﹣x,①当MN为最大线段时,依题意MN2=AM2+NB2,即(7﹣x)2=x2+25,解得x=;②当BN为最大线段时,依题意BN2=AM2+MN2.即x2=25+(7﹣x)2,解得x=.综上所述BN的长为或.12.解:(1)∵∠ABC=90°,BC=6cm,AC=10cm,∴AB===8cm;(2)①如图1,若CP=CA,则:BP=CP+BC=6+10=16或BP=CP﹣BC=10﹣6=4,即2t=16,t=8或2t=4,t=2;②如图2,若AP=AC,则:AB垂直平分PC,BP=BC=6,即2t=6,t=3;③若PA=PC,则P在AC的垂直平分线上,所以P在B左侧,PB=2t,BC=6,∴t=8,PA=2t+6,∵∠ABP=90°,∴AP2=AB2+BP2,即(2t+6)2=(2t)2+82,解得t=;综上所述,当点P向左运动s、2s、3s或向右运动8s时,△ACP为等腰三角形.13.解:(1)∵BQ=2×2=4(cm),BP=AB﹣AP=16﹣2×1=14(cm),∠B=90°,∴PQ===(cm);(2)BQ=2t,BP=16﹣t,根据题意得:2t=16﹣t,解得:t=,即出发秒钟后,△PQB能形成等腰三角形;(3)①当CQ=BQ时,如图1所示,则∠C=∠CBQ,∵∠ABC=90°,∴∠CBQ+∠ABQ=90°.∠A+∠C=90°,∴∠A=∠ABQ,∴BQ=AQ,∴CQ=AQ=10,∴BC+CQ=22,∴t=22÷2=11秒.②当CQ=BC时,如图2所示,则BC+CQ=24,∴t=24÷2=12秒.③当BC=BQ时,如图3所示,过B点作BE⊥AC于点E,则BE==,∴CE=,∴CQ=2CE=14.4,∴BC+CQ=26.4,∴t=26.4÷2=13.2秒.综上所述:当t为11秒或12秒或13.2秒时,△BCQ为等腰三角形.14.解:由题意知AD+DB=BC+CA,且CA=12米,BC=6米,设BD=x米,则AD=(18﹣x)米,在Rt△ACD中:CD2+CA2=AD2,即(18﹣x)2=(6+x)2+122,解得x=3,故树高为CD=6+3=9米.答:树高为9米.15.解:将半圆面展开可得:AD=4π米,DE=DC﹣CE=AB﹣CE=18米,在Rt△ADE中,AE=米.即滑行的最短距离约为22米.16.解:(1)在Rt△AMP中,∵∠A=90°,MA=1.6米,AP=1.2米,∴PM===2,∵PB=PM=2,∴甲房间的宽度AB=AP+PB=3.2米,故答案为:3.2;(2)∵∠MPN=90°,∴∠APM+∠BPN=90°,∵∠APM+∠AMP=90°,∴∠AMP=∠BPN.在△AMP与△BPN中,,∴△AMP≌△BPN,∴MA=PB=2.4,∵PA==0.7,∴AB=PA+PB=0.7+2.4=3.1;17.解:(1)∵42=16>22+32,∴该三角形是钝角三角形,故答案为:钝角,(2)①若4为最长边,则:42=32+x2,解得x=,x=﹣(舍去),②若x最长边,则:x=32+42,得x=5,x=﹣5(舍去),故答案为:5或.(3)∵a2﹣b2﹣c2=x2+3z2﹣x+y2﹣2y+=(x﹣)2+(y﹣1)2+3z2+>0,∴a2>b2+c2,∴该三角形是钝角三角形.18.解:连接AC,∵∠ADC=90°,AD=4,CD=3,∴AC=5.由AB=13,BC=12可得AC2+BC2=AB2,∴△ABC是直角三角形,∴S △ABC =30,S △ACD =6,30﹣6=24(m 2).故这块地的面积为24m 2.19.解:(1)上述四组勾股数组的规律是:32+42=52,62+82=102,82+152=172,102+242=262,即(n 2﹣1)2+(2n )2=(n 2+1)2,所以第六组勾股数为14,48,50.(2)勾股数为n 2﹣1,2n ,n 2+1,证明如下:(n 2﹣1)2+(2n )2=n 4+2n 2+1=(n 2+1)2.20.解:∵EG ⊥AB ,FH ⊥AD ,HG 经过点A ,∴FA ∥EG ,EA ∥FH ,∴∠AEG =∠HFA =90°,∠EAG =∠FHA ,∵AB =9里,AD =7里,EG =15里,∴AF =3.5里,AE =4.5里,∴FH =1.05里.21.(1)证明:如图1,连接AD .∵AB =AC ,点D 是BC 边上的中点,∴AD 平分∠BAC ,∵DE 、DF 分别垂直AB 、AC 于点E 和F .∴DE =DF .(2)解:不变.如图2所示:连接AD ,∵AB =AC =13,BC =10,∴△ABC 底边BC 上的高==12,∴△ABC 的面积=×BC ×12=60,∴AB •DE +AC •DF =60,∴DE +DF =,故答案为:.22.解:过点F作FH⊥AB于点H,∴∠FHB=90°,∵∠EDF=90°,∠E=60°,∴∠EFD=90°﹣60°=30°,∴EF=2DE=24,∴DF==12,∵EF∥AD,∴∠FDA=∠DFE=30°,∴FH=DF=6,∴DH==18,∵△ABC为等腰直角三角形,∴∠ABC=45°,∴∠HFB=90°﹣45°=45°,∴∠ABC=∠HFB,∴BH=FH=6,则BD=DH﹣BH=18﹣6.23.解:(1)t=2时,CD=2×1=2,∵∠ABC=90°,AB=8,BC=6,∴AC===10,AD=AC﹣CD=10﹣2=8;故答案是:2;8.(2)①∠CDB=90°时,S△ABC=AC•BD=AB•BC,即×10•BD=×8×6,解得BD=4.8,∴CD===3.6,t=3.6÷1=3.6秒;②∠CBD=90°时,点D和点A重合,t=10÷1=10秒,综上所述,t=3.6或10秒;故答案为:(1)2,8;(2)3.6或10秒;(3)①CD=BC时,CD=6,t=6÷1=6;②BD=BC时,如图,过点B作BF⊥AC于F,则CF=3.6,CD=2CF=3.6×2=7.2,∴t=7.2÷1=7.2,综上所述,t=6秒或7.2秒时,△CBD是以BD或CD为底的等腰三角形.24.(1)解:这个公式是完全平方公式:(a+b)2=a2+2ab+b2;理由如下:∵大正方形的边长为a+b,∴大正方形的面积=(a+b)2,又∵大正方形的面积=两个小正方形的面积+两个矩形的面积=a2+b2+ab+ab=a2+2ab+b2,∴(a+b)2=a2+2ab+b2;故答案为:(a+b)2=a2+2ab+b2;(2)证明:∵△ABC≌△CDE,∴∠BAC=∠DCE,∵∠ACB+∠BAC=90°,∴∠ACB+∠DCE=90°,∴∠ACE=90°;(3)证明:∵∠B=∠D=90°,∴∠B+∠D=180°,∴AB∥DE,即四边形ABDE是梯形,∴四边形ABDE的面积=(a+b)(a+b)=ab+c2+ab,整理得:a2+b2=c2.25.解:(1)△ABC的面积=3×3﹣×2×1﹣×3×1﹣×2×3,=9﹣1﹣1.5﹣3,=9﹣5.5,=3.5,故答案为3.5;(2)△DEF如图2所示;面积=2×4﹣×1×2﹣×2×2﹣×1×4,=8﹣1﹣2﹣2,=8﹣5,=3.26.解:∵小球滚动的速度与机器人行走的速度相等,运动时间相等,∴BC=CA.设AC为x,则OC=9﹣x,由勾股定理得:OB2+OC2=BC2,又∵OA=9,OB=3,∴32+(9﹣x)2=x2,解方程得出x=5.∴机器人行走的路程BC是5cm.27.解:(1)当m=2,n=1时,a=5、b=4、c=3,∵32+42=52,∴a、b、c的值能为直角三角形三边的长;(2)观察得,a=m2+n2,b=2mn,c=m2﹣n2;(3)以a,b,c为边长的三角形一定为直角三角形,∵a2=(m2+n2)2=m4+2m2n2+n4,b2+c2=m4﹣2m2n2+n4+4m2n2=m4+2m2n2+n4,∴a2=b2+c2,∴以a,b,c为边长的三角形一定为直角三角形.28.解:过C作CD⊥AB交AB延长线于点D,∵∠ABC=120°,∴∠CBD=60°,在Rt△BCD中,∠BCD=90°﹣∠CBD=30°,∴BD=BC=×20=10(米),∴CD==10(米),∴AD=AB+BD=80+10=90米,在Rt△ACD中,AC==≈92(米),答:A、C两点之间的距离约为92米.29.解:(1)由图可得,×(a+b)(a+b)=ab+c2+ab,整理得=,∴a2+2ab+b2=2ab+c2,∴a2+b2=c2.(2)一个满足条件的在x轴上的点的坐标:(﹣1,0);一个满足条件的在y轴上的点的坐标:(0,2+),这样的点有4个.故答案为:(﹣1,0);(0,2+),4.30.(1)解:∵直角梯形和矩形的角都为直角,所以它们一定为勾股四边形.(2)证明:连接CE,∵BC=BE,∠CBE=60°∴△CBE为等边三角形,∴∠BCE=60°又∵∠DCB=30°∴∠DCE=90°∴△DCE为直角三角形∴DE2=DC2+CE2∵AC=DE,CE=BC∴DC2+BC2=AC231.解:(1)AB==.(2)∵已知点A、B在平行于x轴的直线上,点A的横坐标为7,点B的横坐标为5,∴AB=7﹣5=2.(3)由题意,直线AB的解析式为y=x+3,延长AB交直线y=5于N(2,5).①当1﹣a<2,即a>﹣1时,作CM∥y轴交AB于M.则M(1﹣a,4﹣a),∴CM=5﹣(4﹣a)=a+1,∴S△ABC=•CM•(B x﹣A x)=•(a+1)•3=a+.②当1﹣a>2,即a<﹣1时,同法可得S△ABC=﹣a﹣.32.解:(1)∵AC=80cm,BC=60cm,AB=100cm,∴AC2+BC2=AB2,∴△ABC为直角三角形,且∠ACB=90°,∵AB=2BE,∴E为AB的中点,即CE为AB边上的中线,∴CE=AB=50cm;(2)作CF⊥AB,交AB于点F,∵CE=CD,∴EF=DF,∵S△ABC=AC•BC=AB•CF,∴CF==48cm,在Rt△ACF中,根据勾股定理得:AF==64cm,∴EF=AF﹣AE=64﹣50=14cm,则ED=2EF=28cm.33.解:∵在△ABC中,AB=3,AC=4,BC=5,∴AB2+AC2=BC2,即∠BAC=90°.又∵PE⊥AB于E,PF⊥AC于F,∴四边形AEPF是矩形,∴EF=AP.∵M是EF的中点,∴AM=EF=AP.当AP⊥BC时,AP的最小值即为直角三角形ABC斜边上的高,∴AM的最小值是.34.解:作AD⊥BC于D,在Rt△ABD中,∠B=45°,∴DA=DB,由勾股定理得,AD2+BD2=AB2=6,解得,AD=DB=,∵∠B=45°,∠BAC=75°,∴∠C=60°,∴∠DAC=30°,∴CD=AC,由勾股定理得,AD2+CD2=AC2,即3+CD2=4CD2,解得,CD=1,则BC=BD+CD=+1.35.解:①AB=AP时,DP==;②BP=AP时,DP=AB=×4=2;③BA=BP时,过点B作BH⊥CD于H,则BH=AD=3,由勾股定理得,PH==,DP=4﹣,或者DP′=4+.综上所述,DP的值为,2,4﹣,或4+.36.解:(1)根据题意,得BP=2t,PC=16﹣2t=16﹣2×3=10,AC=8,在Rt△APC中,根据勾股定理,得AP===2.答:AP的长为2.(2)在Rt△ABC中,AC=8,BC=16,根据勾股定理,得AB===8若BA=BP,则2t=8,解得t=4;若AB=AP,则BP=32,2t=32,解得t=16;若PA=PB,则(2t)2=(16﹣2t)2+82,解得t=5.答:当△ABP为等腰三角形时,t的值为4、16、5.(3)若P在C点的左侧,CP=16﹣2t.AP=20﹣2t(20﹣2t)2=(16﹣2t)2+82解得:t=5,若P在C点的右侧,CP=2t﹣16.AP=2t﹣12;(2t﹣12)2=(2t﹣16)2+82解得:t=11答:当t为5或11时,能使DE=CD.37.解:(1)如图3所示∵图形的面积表示为a2+b2+2×ab=a2+b2+ab,图形的面积也可表示为c2+4×ab=c2+ab;∴(a+b)2=c2+4×ab,a2+b2+ab=c2+ab,∴a2+b2=c2即直角三角形两直角边的平方和等于斜边的平方.(2))如图4所示:∵大正方形的面积表示为(a+b)2;大正方形的面积也可表示为c2+4×ab∴(a+b)2=c2+4×ab,a2+b2+2ab=c2+2ab,∴a2+b2=c2;即直角三角形两直角边的平方和等于斜边的平方.38.解:(1)如图1,∵AB=AD=10m,AC⊥BD,AC=8m,∴DC==6(m),则△ABD的周长为:10+10+6+6=32(m).故答案为:32m;(2)如图2,当BA=BD=10m时,则DC=BD﹣BC=10﹣6=4(m),故AD==4(m),则△ABD的周长为:AD+AB+BD=10+4+10=(20+4)m;故答案为:(20+4)m;(3)如图3,∵DA=DB,∴设DC=xm,则AD=(6+x)m,∴DC2+AC2=AD2,即x2+82=(6+x)2,解得;x=,∵AC=8m,BC=6m,∴AB=10m,故△ABD的周长为:AD+BD+AB=2(+6)+10=(m).。

山东省滕州市东郭中学2022-2023学年九年级上学期周末培优语文试题

山东省滕州市东郭中学2022-2023学年九年级上学期周末培优语文试题

2022-2023学年度山东省滕州市东郭中学第一学期周末培优试题九年级语文一、基础知识综合1.阅读下面的选段,回答后面的问题。

张乡绅先攀谈道:“世先生同在桑梓.,一向有失亲近。

”范进道:“晚生久仰.老先生,只是无缘,不曾拜会。

”张乡绅.道:“适才看见题名录,贵房师高要县汤公,就是先祖的门生,我和你是亲切的世弟兄。

”范进道:“晚生侥.幸,实是有愧。

却幸得出老先生门下,可为欣喜。

”张乡绅四面将眼睛望了一望,说道:“世先生果是清贫。

”随在跟的家人手里拿过一封银子来,说道:“弟却也无以为敬,谨具贺.仪五十两,世先生权且收着。

这华居,其实住不得,将来当事拜往,①不甚便。

弟有空房一所,就在东门大街上,三进三间,虽不轩.敞,也还干净,就道与世先生;搬到那里去住,早晚也好请教.些。

”范进再三推②,张乡绅急了,道:“你我年③世好,就如至亲骨肉一般,若要如此,就是见外了。

”范进方才把银子收下,作揖.谢了。

(1)下列词语中加点字的注音完全正确的一项是()A.桑梓.(zǐ)久仰.(yáng)B.侥.幸(yáo)请教.(jiào)C.作揖.(jí)贺.仪(hè)D.轩.敞(xuān)乡绅.(shēn)(2)依次填人文段中横线上的汉字,全都正确的一项是()A.①俱②辞③谊B.①具②辞③宜C.①具②词③宜D.①俱②词③谊(3)下列句子中加点词语的解释有误一项是()A.张乡绅先攀谈..道:“世先生同在桑梓,一向有失亲近。

”(攀谈:拉扯闲谈。

)B.我和你是亲切..的世弟兄。

(亲切:亲近。

)C.弟却也无以为敬,谨具贺仪五十两,世先生权且..收着。

(权且:暂且;姑且。

)D.弟有空房一所,就在东门大街上,三进三间,虽不轩敞..,也还干净,就送与世先生。

(轩敞:高大,宽敞。

)二、句子默写2.按要求默写。

(1)长风破浪会有时,_______________。

[李白《行路难(其一)》](2)______________,病树前头万木春。

周末Unit+2+培优特训二++2024-2025学年人教版八年级英语上册

周末Unit+2+培优特训二++2024-2025学年人教版八年级英语上册

2024----2025新目标八年级英语第一学期周末培优特训二(范围unit 2 新目标八年级英语)一翻译短语1. 几乎从不;2. 摇摆舞;3. 至少;不少于;起码;4. 看电视;5. 看电影;6. 帮忙做家务;7. 熬夜;8. 购物;9. 上网;10. 上钢琴课;11. 多久一次;12. 每天;13. 一周一次;14. 一个月三次;15. 吃一份健康的早餐;16. 对……有好处;17. 许多;大量;18. 一起玩耍;19. 几乎每天;20. 一周四到六次21. 垃圾食品;22. 例如;像……这样;23. 多于;24. 少于;25. 参加体育运动;26. 游戏类节目;27. 上网;28. 业余活动;29. 玩电脑游戏;30. 去野营;二、完形填空。

Do you know how to keep healthy?First,good 1 habits are very important. Many students 2 to eat junk food. Maybe it tastes (尝起来) good,but it's 3 for our health. And many students only eat their favorite food. It's bad for their health,4 .It's good to eat 5 fruit and vegetables because they can 6 us keep healthy. And we should have a balanced diet (均衡饮食).It can give us lots of energy (能量) and keep our body 7 .8 ,we should often exercise. A strong (强壮的) and healthy body comes from enough exercise. We can 9 some time doing our favorite sports every day.Finally,we should have good living habits 10 getting up and going to bed on time.1. A. studying B.eating C.drinking D.living2. A. hope B.try C.like D.dislike3. A. good B.bad C.well D.nice4. A. also B.either C.too D.neither5. A. more B.less C.little D.few6. A. give B.tell C.help D.ask7. A. healthy B.unhealthy C.active D.beautiful8. A. First B.Second C.Third D.Finally9. A. like B.take C.spend D.cost10. A. such B.likes C.such as D.for example三、语法选择Do you often take exercise? We all know that it is good for _1__. Look __2__ the following information (信息). There __3__ four reasons for it.Exercising can completely change our mood (改变我们的心情)!When we work out, our body produces endorphins (内啡肽). They can make us feel happy. I always feel much __4__ after exercising when I feel upset. Next time when you have a bad day, try __5__ for a run. Then your day won't seem so bad.Exercising can help us make friends. Whenever I move to a new city, I look for exercise classes to take. There I meet some people and they have the same interest as me. When we meet difficult problems during exercising, we can support (支持) each other!Exercising helps us relax.When we take exercise, we will forget the problems of our life. During the test month, I always spend __6__ hour a day exercising. It makes me feel relaxed and it also helps me __7__ well at night.Exercising makes us strong and healthy!It is helpful for us to spend about 30 __8__ running every day! I believe as long as(只要)you keep __9__ that, you will also be strong and healthy.So, next time you feel down, do some sports. It might not be easy, __10__ you will feel good after that. Believe me!1. A. our B. us C. we2. A. at B. for C. on3. A. are B. is C. was4. A. good B. better C. best5. A. go B. going C. to going6. A. a B. an C. the7. A. sleep B. sleeping C. to sleeping8. A. minute B. minutes C. minute's9. A. doing B. do C. to do10. A. but B. or C. although四阅读理解ADo you like exercising? You don’t like to be fat, do you? But how do you stay in shape? Look!Some people are discussing how they stay in shape.I work and live in the noisy city, so I ride my bicycle. I like to cycle (骑自行车) somewhere most of the time and I also like to walk everywhere. I try to walk to a lot of different places.Matthew/CanadaI like to go running two or three times a week. To be honest, I think I’m the best runner. I probably walk for fifteen minutes, then run for ten minutes, and next walk for another fifteen minutes.Linda/the United StatesI really like running but at the moment it’s quite cold outside, so I don’t like to go running outside. I usually go to the gym (体育馆) and use the treadmill (跑步机).Paul/EnglandEvery week I go to the health club. I like to exercise with others. It makes me relaxed. I also do some push-ups (俯卧撑) before going to bed, but sometimes I forget to do that. I also try to control (控制) what I eat. I eat less meat and more vegetables.Aki/Japan1.How might Matthew get to work?A.By car.B.By bike.C.By subway.D.By bus.2.Where does Matthew come from?A.Japan.B.England.C.America.D.Canada.3.What do Linda and Paul both like doing?A.Running.B.Riding a bike.C.Swimming.D.Walking a lot.4.What does Aki often do before going to bed?A.She often watches TV.B.She often drinks some milk.C.She often does some sports.D.She often listens to music.5.What can we learn from this text?A.Aki tries to keep a good eating habit.B.Linda can run fast for half an hour.C.Paul likes running outside in winter.D.Matthew’s home is far from his office.BA healthy eating habit along with enough exercise can help you keep healthy. When you are young, it is important to give your body what it needs. If you skip meals, you can't get enough calories (卡路里). And then you may feel tired. By the way, the calorie is just another word for energy. About 50% of your calories should come from rice, bread, vegetables and fruit. You also need to drink a lot of water, 6 to 8 glasses a day. Drinking enough water can make your body work better and make you healthy.Exercise can help to make you look good, feel good and be healthy. Scientists say that kids should spend at least 30 minutes exercising a day, five times a week. It is easy to do! You can walk or ride your bike to school, and play sports at school. However, kids often give up sports, saying they have no time left after finishing their homework. In fact, doing exercise can help them sleep better and do better in their lessons.If you follow the advice above, you will look and feel much better and become healthy.6.The underlined word "skip" means "______" in Chinese.A. 询问B. 跳过C. 阻止D. 转移7.According to the scientists, kids should spend at least ______ minutes exercisingevery week.A. 30B. 50C. 100D. 1508.Why do many kids give up sports according to the passage?A. Because they are too lazy to exercise.B. Because they feel great after giving up sports.C. Because they are busy with their studies.D. Because they don’t like playing sports at all.9.Which of the following is TRUE according to the passage?A. About 80% of your calories should come from rice, bread, vegetables and fruit.B. You need to drink three or four glasses of water every day to keep healthy.C. Students should exercise at least twice a week to keep healthy and happy.D. Doing exercise can help kids sleep better and do better in their lessons.10.What's the best title for the passage?A. How to Sleep WellB. How to ExerciseC. How to Look ThinnerD. How to Keep HealthyC配对阅读。

周日培优补差方案

周日培优补差方案

周日培优补差方案以下是 6 条“周日培优补差方案”:1. 嘿,周日别再荒废啦!咱来一套专门的培优补差方案咋样?你看啊,就像盖房子,基础不牢可不行啊!咱得先把薄弱的地方一点点补起来,这就好比给房子加固根基。

然后呢,再在优势科目上更进一步,简直就像给房子添砖加瓦,让它越来越漂亮!比如你英语差,咱就使劲攻英语,你数学好,那就在周日让它更好!还等什么呢,赶紧行动起来呀!2. 哇塞,周日可是个大好机会呀!培优补差正当时!这就好像跑步比赛,你要是不努力往前冲,可就要被别人甩在后头啦!比如你语文作文不行,那就周日好好练练呀,读读写写,多积累素材。

要是科学有难题,就专门花时间去搞懂它,这不就像攻克一个大难关嘛!周日不拼,更待何时呀!3. 哎呀呀,周日培优补差可得好好规划!这就跟爬山一样,得一步一步来。

补差就是填补那些难走的路,让自己走得更稳。

培优呢,就是努力冲向山顶,去看最美的风景!比如说你物理总是考不好,周日就多花时间在物理上呀,做做题,找找方法。

你要是擅长画画,就在周日让自己的画画技能更上一层楼嘛,多有意思呀!别犹豫啦,赶紧干起来吧!4. 嘿哟,周日可不能浪费掉哦,咱得把培优补差安排得明明白白的!想想看,如果把学习比作一场战争,那补差就是加强防御,培优就是主动出击呀!像你历史知识不扎实,周日就专门去搞明白那些历史事件呀。

你要是擅长跳舞,周日就尽情去练习,变得更厉害!别错过周日这个好时机咯!5. 哇哦,周日培优补差可是很重要滴!这就像搭积木,要一块一块稳稳地搭。

补差就是补齐那些少掉的积木块,培优就是把积木搭得更高更漂亮!假设你数学计算老出错,那就在周日好好练练计算呀。

要是你英语口语很棒,周日就继续加强呀,让自己变成英语达人!还不赶紧行动起来呀!6. 嘿,可别小瞧了周日呀,这是培优补差的黄金时间呢!就好像航海,补差是修补漏洞,培优是扬起风帆加速前进!比如你化学公式记不住,周日就努力去背呀。

你要是擅长唱歌,就在周日尽情发挥,让自己的歌声更动听!周日就得好好利用呀,对不?。

周末培优转差工作计划

周末培优转差工作计划

周末培优转差工作计划(实用版)编制人:__________________审核人:__________________审批人:__________________编制单位:__________________编制时间:____年____月____日序言下载提示:该文档是本店铺精心编制而成的,希望大家下载后,能够帮助大家解决实际问题。

文档下载后可定制修改,请根据实际需要进行调整和使用,谢谢!并且,本店铺为大家提供各种类型的实用范文,如学习资料、英语资料、学生作文、教学资源、求职资料、创业资料、工作范文、条据文书、合同协议、其他范文等等,想了解不同范文格式和写法,敬请关注!Download tips: This document is carefully compiled by this editor. I hope that after you download it, it can help you solve practical problems. The document can be customized and modified after downloading, please adjust and use it according to actual needs, thank you!In addition, this shop provides various types of practical sample essays, such as learning materials, English materials, student essays, teaching resources, job search materials, entrepreneurial materials, work examples, documents, contracts, agreements, other essays, etc. Please pay attention to the different formats and writing methods of the model essay!周末培优转差工作计划周末培优转差工作计划(5篇)时间就如同家里小溪的流水一样流逝,我们又将续写新的诗篇,展开新的旅程,来为以后的工作做一份计划吧。

周末培优特训四八年级下册

周末培优特训四八年级下册

周末培优特训四八年级下册周末培优特训是许多家长和学生为了提高学习成绩和拓展知识面而选择的一种学习方式。

特别是对于四八年级下册的学生来说,周末培优特训可以帮助他们巩固所学知识,提高学习效率,为升入初中做好充分的准备。

在进行周末培优特训时,首先要根据学生的实际情况和学习需求选择合适的培优机构或老师。

这些机构或老师应该有丰富的教学经验,能够针对学生的学习特点和问题进行有针对性的辅导。

同时,家长也要积极配合,与培优机构或老师保持沟通,了解学生的学习情况和进步情况,及时调整学习计划。

在周末培优特训中,学生应该根据自己的学习情况和特点,合理规划学习时间和内容。

在学习内容方面,应该重点复习四八年级下册的各学科知识点,特别是数学、语文、英语等重要学科的重点知识。

在学习时间方面,要合理安排每天的学习时间,保证既有充足的学习时间,又能保证有足够的休息时间,避免学习过度导致疲劳。

此外,学生在周末培优特训中还应该注重学习方法的培养和提高。

学会高效学习的方法,能够帮助学生更好地掌握学习内容,提高学习效率。

例如,学会制定学习计划,合理安排学习时间,掌握学习技巧,培养学习兴趣等,都是提高学习效果的关键因素。

在进行周末培优特训时,学生还应该注重综合素质的培养。

学习是学生的主要任务,但学生的身心健康和全面发展同样重要。

因此,学生应该积极参加各种学科的学习,培养自己的学科综合能力,同时也要注重体育锻炼、社交活动等,保持身心健康的状态,促进学习的全面发展。

总的来说,周末培优特训对四八年级下册的学生来说是一种很好的学习方式,可以帮助学生提高学习成绩,拓展知识面,为学生的学习和发展打下坚实的基础。

学生在进行周末培优特训时,要注重学习内容的复习,学习方法的培养,综合素质的培养,才能取得更好的学习效果,为未来的学习和发展做好充分的准备。

希望学生和家长能够充分认识到周末培优特训的重要性,积极配合,共同努力,取得学习的更大成就。

周末培优申请书范本

周末培优申请书范本

尊敬的校领导:您好!我是来自XX学校的一名学生,我想申请参加学校的周末培优班。

我相信,通过这个机会,我能够更好地提升自己的学术水平和综合素质,为未来的学习和人生奠定坚实的基础。

首先,我想谈谈我对周末培优班的认识。

我相信,通过这个班级,我能够接触到更多的优质教育资源,得到更全面、更深入的学习。

这些资源不仅包括优秀的教师团队,还有丰富的教学内容和多样化的学习方式。

我相信,这些都能够激发我的学习兴趣,提高我的学习效率。

其次,我想证明我有能力和决心参加周末培优班。

在学习上,我一直以来都是一个积极主动的学生。

我不仅在课堂上认真听讲,还会在课后花大量的时间进行自主学习和复习。

我相信,通过这样的学习方式,我能够更好地掌握知识,提高自己的学习能力。

此外,我也积极参加各种课外活动,如社团活动、志愿者服务等,这些经历让我更加懂得珍惜时间,更加明白学习的重要性。

再次,我想说明参加周末培优班的意义。

首先,我相信这个班级能够帮助我提高学术水平,让我在各个学科上都能够有更深入的理解和掌握。

这将为我未来的学习打下坚实的基础。

其次,通过这个班级,我能够接触到更多的同学,与他们共同学习、共同进步。

这不仅能够提高我的团队合作能力,还能够拓宽我的人际交往圈子。

最后,我相信参加周末培优班能够让我更好地培养自己的综合素质,如领导力、创新力、沟通力等,这些能力对于我未来的发展非常重要。

最后,我想承诺,如果我有幸被录取为周末培优班的一员,我将以更加饱满的热情和更加努力的态度投入到学习中。

我将以优秀的同学为榜样,不断提高自己的学术水平和综合素质。

同时,我也将积极参与班级的各种活动,为班级的发展贡献自己的力量。

希望校领导能够考虑我的申请,给予我这个宝贵的机会。

我将倍加珍惜,努力回报。

此致敬礼!XX学校学生XX年XX月XX日。

学校周末培优班教师代表发言稿

学校周末培优班教师代表发言稿

尊敬的领导、亲爱的家长们,大家好!
我代表学校周末培优班的教师团队,向各位家长表示诚挚的问候和衷心的感谢。

在过去的一段时间里,我们有幸与孩子们一起度过了愉快而充实的学习时光。

首先,我要感谢各位家长对我们的信任和支持。

正是因为您们的支持,我们才能够有机会教育和引导孩子们,为他们的学业发展提供帮助和指导。

我们将倍加珍惜这份信任,竭尽全力为孩子们打下坚实的学习基础。

其次,我要感谢每一位孩子的努力和付出。

在培优班中,孩子们展现出了积极的学习态度和良好的团队合作精神。

他们勇于面对挑战,克服困难,不断追求进步。

你们的努力和成绩令人欣慰,也是我们最大的骄傲。

作为教师,我们深知教育的重要性和责任。

我们将始终以严谨的专业态度,为孩子们提供优质的教育资源和个性化的指导。

我们将注重培养孩子们的学习方法和思维能力,引导他们形成良好的学习习惯和积极的学习态度。

同时,我们也将注重培养孩子们的综合素养和社交能力。

我们鼓励孩子们积极参与社会实践和公益活动,培养他们的领导力和团队合作精神,让他们成为全面发展的人才。

最后,我要感谢学校领导对周末培优班工作的大力支持和关心。

有了您们的指导和帮助,我们才能够做得更好,不断提高教学质量和服务水平。

在未来的日子里,我们将继续努力,与家长和学校携手共进,为孩子们的成长和发展贡献更多的智慧和力量。

谢谢大家!。

2024年部编版七年级上册语文周末复习培优训练试卷及答案 (6)

2024年部编版七年级上册语文周末复习培优训练试卷及答案 (6)

周末提优6第六单元学习任务群:想象之翼总分:50 分建议用时:45 分钟得分:基础型学习任务群1. [河北人文信息]阅读下面文字,回答后面的问题。

(8 分)在承德避暑山庄,宫殿、山峦、湖泊、平原汇聚一园,园内亭、阁、轩、榭、(miàoyǔ)等120 余组景观错落有致,规模..宏大。

在清代,许多民族团结重大历史事件都发生在这里,避暑山庄也成为我国民族交融交往交流历史的见证者。

一座山庄,半部清史。

站在这处园林中,你仿佛能穿越历史,看到清代君王身着布满龙纹的(páozi),在龙椅上正襟危坐,展现帝王气概..。

(1)根据文段中的拼音写出相应的词语,给文段中加点的词语注音。

(4 分)①(miàoyǔ)________________②(páozi) ________________③规模________________④气概________________(2)下面是《现代汉语词典》(第7 版)中“致”作为实词时的几个主要义项。

文段中“错落有致”的“致”的意思应该是___________(只填序号)。

(2 分)致①给予;向对方表示(礼节、情意等)。

②集中(力量、意志等)于某个方面。

③达到;实现。

④招致;引起。

⑤情趣。

⑥精密;精细。

(3)文段中画波浪线的句子有语病,请你将修改后的句子写在下面。

(2 分)2. 下面句子中加点的成语,使用不恰当的一项是(2 分) ····················( )A. 汉语中的龙,神通广大....,可以庇佑世人温饱、平安,是吉祥如意的化身。

B. 春天的白洋淀,美不胜收,这样的景致让你灵机一动....,人也变得神采奕奕起来。

C. 随着通电合闸,清澈的地下水喷涌而出,在场的10 多名村民顿时眉开眼笑....。

2023年外研版七年级上册英语周末培优训练 (7)

2023年外研版七年级上册英语周末培优训练 (7)

·英语
Later, Sam has a cold and he gets 11. a D in his test.His mother isn’t happy 12. and she says that he can only use the computer once a week.She asks Sam to do morning exercises every day.She also tells him to study 13. hard at school.Sam thinks it is time 14. for him to change (改变).After that, he 15. does/finishes his homework first every time he gets back home.When using the computer, he makes good use of it.
了)_________.
A.it’s easy to use a driverless car
B.a driverless car can decide to drive quickly or slowly
C.a driverless car can pick up children
D.it’s cheap to buy a driverless car
·英语
A driverless car can follow the school time to pick up children at home and take them to school across the town.
However, a driverless car can not do everything well.For example, a dog is running onto the road and a little girl is walking on the side of the road.How does the driverless car make a decision? Change direction to avoid the dog? But it means hitting the girl.Ies the underlined word “avoid” in Paragraph 2 mean

广东省七上人教版英语周末培优特训五(含答案解析)025345

广东省七上人教版英语周末培优特训五(含答案解析)025345

广东省七上人教版英语周末培优特训五试卷考试总分:9 分考试时间: 120 分钟学校:__________ 班级:__________ 姓名:__________ 考号:__________一、阅读理解(本题共计 2 小题,每题 3 分,共计6分)1.STUDY BOOKSLearning How to Learn $24.99Children who read this book show great interest in story. Many pictures will help understand it easily and quickly.Basic Study Manual $38.50Read this book and learn:What the three barriers(障碍)to study are and what to do about them;What to do if you are fed up with a subject Children read it to improve the ability(能力)to study.How to Use a Dictionary Picture Book for Children $35.00Read this book and learn:How to find words in a dictionary;What the different marks in a dictionary mean;How to use a dictionary to pronounce(发音)words correctly.Buy this book and help children lock their education. What's more, you'll just pay 50% for it before July 1, 2017.(1)According to the ads, these three books are for ______.A.menB.parentsC.children(2)"______" can tell you the meaning of the different marks in a dictionary.A.Learning How to LearnB.Study Skills for LireC.How to Use a Dictionary Picture Book for Children(3)If you buy the three books on June 18, 2017, you will have to pay ______ for them.A.98.49B.49.25C.80.992.If you can't see anything, do you think you'll have a nice future? Xiong Linghao, an 18-year-old pianist, is giving us a great answer.The girl comes from Mianyang, Sichuan. She lost her eyesight(视力)not long after she was born. Luckily, music helped her. At the age of 6, she started to learn to play the piano. Different from other piano learners, she could only learn by hearing "music" in the beginning."The piano is my best friend," Xiong said. "It brings so much fun to my life and gives me hope."Xiong is a student at the Chengdu Special Education School. Because of her talent for playing the piano, she already won many prizes in piano competitions. "I never try to win prizes or fame(名声)when learning music," she said. "Like Beethoven, I just want to show my hope and love for life."Months ago, a video of Xiong playing the piano in a competition appeared online and over 7 million people watched it. Many of them said they were-touched by Xiong's optimism(乐观). "When bad luck gets to her, she chooses to stand up with music," one person said. "She lights up(照亮)the dark world in front of her with music", another person said."If I had eyesight for three days, I would see how I look and cook a big meal for my parents. Also, I would see what my piano looks like," Xiong said.(1)What happened when Xiong Linghao was learning to play the piano?A.Her mother read music to her.B.She stopped playing with others.C.She felt happy and got hope.D.Her family became very poor.(2)Which question can Paragraph 4 answer?A.How many prizes did Xiong Linghao win?B.What does Xiong Linghao think of her life?C.When did Xiong Linghao start to like Beethoven?D.Why does Xiong Linghao like playing the piano?(3)What can we learn about Xiong Linghao from the passage?A.She started to learn to play the piano ten years ago.B.Many people know her through her video online.C.She hopes to make much money by playing the piano.D.She would see her piano first if she was able to see.(4)What would be the best title for the passage?A."Seeing" the world through musicB.Playing the piano in competitionsC.Watching a special girl play musicD.Looking forward to playing the piano二、语法填空(本题共计 1 小题,共计3分)3. (3分)阅读下面短文,根据语境,音标或所给单词的提示,在每个空格内填入适当的一个单词,要求所填的词意义准确,形式正确,使短文意思完整,行文连贯。

周末培优安全纪律保证书

周末培优安全纪律保证书

周末培优安全纪律保证书尊敬的家长们、亲爱的同学们:大家好!为了确保周末培优活动的顺利进行,保障同学们的人身安全,维护良好的学习秩序,我们特制定本安全纪律保证书。

请家长们、同学们共同遵守。

一、安全方面1. 同学们要自觉遵守交通规则,乘坐合法交通工具,严禁搭乘无牌、无证、非法营运的车辆。

如自驾出行,请确保驾驶安全,遵守交通法规。

2. 活动期间,同学们要遵守活动场所的规章制度,不得在禁烟区域吸烟,不得乱丢垃圾,保持环境整洁。

3. 参加户外活动时,要遵循活动组织者的安排,穿戴适当的运动装备,携带必备的急救用品,注意个人安全。

4. 同学们要注重个人健康,如有疾病,应及时告知活动组织者,不得隐瞒病情参加活动。

5. 活动期间,同学们要服从活动组织者的管理,不得擅自离队,如有特殊情况,请及时向组织者请假。

6. 家长们要关注同学们的安全,确保同学们在活动前、活动中、活动后都处于安全状态。

如遇紧急情况,请及时与活动组织者联系。

二、纪律方面1. 同学们要尊重师长和同伴,礼貌待人,遵守活动秩序,不得大声喧哗、闹事。

2. 活动期间,同学们要自觉遵守课堂纪律,认真听讲,积极参与,不得玩手机、打闹、睡觉等影响他人学习的行为。

3. 同学们要珍惜学习机会,不得迟到、早退、请假。

如有特殊情况,请提前向老师请假。

4. 家长们要配合老师,督促同学们完成作业,确保同学们在学习上取得进步。

5. 活动结束后,同学们要按时离场,不得在活动场所逗留,确保活动场所的安全。

6. 家长们要关注同学们的学习情况,与老师保持沟通,共同促进同学们的学习成长。

本安全纪律保证书自发布之日起生效,敬请家长们、同学们认真遵守。

我们将共同努力,为同学们营造一个安全、和谐、美好的学习环境。

祝愿各位同学们周末培优活动愉快,学有所成!敬祝家庭幸福,学业进步!【组织单位】【日期】。

Unit+8+周末培优特训课件+2024-2025学年人教版英语九年级全一册

Unit+8+周末培优特训课件+2024-2025学年人教版英语九年级全一册

12. 考查介词。arrive表示“到达”接宾语时要加介词,机场是小地方,应 该用at。
stop hurry he happy what in follow at rule or important start
This was burned into my mind, and now when I see a traffic light change to yellow, I 15. stop the car and take a moment to relax.
( C ) 2. Jimmy is 5 years old. What should he do when he is in a
car?
A. Put the seat belt on.
B. Sit on the front sБайду номын сангаасat.
C. Use a booster seat.
D. Jump up and down.
( B ) 3. What does the underlined word “distract” mean in
Paragraph 4?
A. Pick up.
B. Draw away.
C. Eat up.
D. Turn off.
3. 词义猜测题。根据“Do you drive, listen to music, eat your sandwich and
So you all should follow traffic safety tips in order to stay safe and be an example for others.
Remember: rules are made for your own safety. Take care and have a safe ride.

第6周:周末培优

第6周:周末培优

9月29日周末培优中考频度:★★★☆☆难易程度:★★★☆☆典例在线:用简便方法计算:(79−56+318)×18–1.45×6+3.95×6.【参考答案】17【试题解析】原式=79×18−56×18+318×18–1.45×6+3.95×6=14–15+3–6×(1.45–3.95)=2+15=17.【解题必备】有理数混合运算技巧归类:1.加减结合:将互为相反数、正数、负数、分母相同或易于通分的数、小数及可凑整的数等结合.2.乘法结合:将互为倒数的数或有倍数关系的数结合.3.分项:用结合律将一个数分解为几个数.4.倒序相加:利用运算律,改变运算顺序,简化计算;5.正逆用运算律:正难则反,逆用运算定律以简化计算.学霸推荐:1.计算:(1)1218+(−334)+(−218)−1.25;(2)−12018+(−2)3×(−12)−|−1−2|;(3)−12×(13−14+12).2.计算:(1)1–43×(34–78);(2)7×2.6+7×1.5–4.1×8.3.计算:(1)(–28)÷(–6+4)+(–1)×5;(2)(14−56+13+32)÷(−16)2.1.【解析】(1)原式=(1218–218)+(–334–1.25)=10–5=5;(2)原式=–1+4–3=0;(3)原式=–4+3–6=–7.(2)原式=7×(2.6+1.5)–4.1×8,=7×4.1–8×4.1,=(7–8)×4.1,=–4.1.学科!网3.【解析】(1)原式=(–28)÷(–2)+(–5)=14–5=9;(2)原式=(14–56+13+32)×36=9–30+12+54=45.。

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八年级英语unit2 练习
一单项选择
1. H e’s never seen the film .?
A is he
B has he
C isn’t he
D hasn’t he
2. -----Can I borrow your dictionary?
-----Of course,but don’t it to others.
A borrow
B keep
C lend
D take
3 -----How long has she been a nurse? -----
A Four years ago
B Since 2002
C In 2002
D Before five years
4 When I got home ,I saw him on the Internet.
A working
B was working
C work
D worked
5 -----Will you go to see the film Gold Mountain this evening?
-----No, I won’t . I it already.
A saw
B have seen
C see
D will see
6 Helen didn’t know anything about it he father told her.
A if
B because
C after
D until
7 How does Jack usually go to work?
He drive a car. But now he there to lose weight.
A used to is used to walk
B was used to is used to walking
C was used to is used to walk
D used to is used to walking
8 Amy Jeff when they were both 25 years old.
A get married
B married
C married with
D married to
9 Yao Ming has Shanghai from the NBA
A returned to
B returned
C came back to
D returned back bo
10 The teacher made the problem
A much easy
B very easy
C very easily
D much easily
二、用所给动词的适当形式填空。

1 Nearly two years ( pass) since two years ago.
2 He (give) the book back to you if he ( finish) reading it tomorrow.
3 The bowl is empty. He (eat) the food.
4 I think we will have a great time ( spend) the term.
5 I hope Daniel ( study) hard this term.
6 The teacher ( have) a meeting at six yesterday evening.
7 The question is (easy) , so you can work it out very (easy).
8 Daniel and his friend (keep) the book for about two weeks.
9 You ‘d better ( not stop) talking at the meeting.
10. I ( draw) the picture since I (leave) school.
三.翻译下列词组。

1 与某人保持联系
2 与某人交流
3 在过去的几年里
4 把某物借给某人(两种)
5 在路的两边
6 窄而脏的公路
7 单独(三种)8 习惯于做某事
9 居住条件10 乘公交车往返于城镇
11 在小学12 采取行动去改善这种情况
13 使交流更容易地多14 去国外,出国
四.根据短文内容及首字母提示,写出所缺的单词,使短文意思完整、正确。

I always thought that money was the most important thing in the world. If there was no money, there would be many things I could not have, for example, d 1 food, beautiful clothes, a big house and so on, I would be u 2 . But now I have c 3 my mind. I think the most important thing is health.
In May, 2003, my brother got a t 4 disease.
At first, we didn’t worry too much about it. We just saw a doctor and gave him some medicine. But after 3 days, my brother got w 5 . We took him to the hospital and the doctor said he must stay there. After checking him, the doctor said that he had c 6 a disease called measles. We were all worried. He was made to take more medicine and given an injection (打针). Everyone in my family was worried about him. We all hoped he would be b 7 soon.
From then on, I began to realize that I was w 8 . Money is not the most important thing in the world. If a person who has a lot of money is dead, can money make him a 9 ? Of course the answer is no. Good health is the most important thing for everyone. We should take good care of o 10 and try our best to keep us away from disease.
1. ____________
2. ____________
3. ____________
4. ____________
5. ____________
6. ____________
7. ____________
8. ____________
9. ____________ 10 .
五、翻译句子
1 在过去的几年里,南通发生了很大的变化。

,in Nantong.
2 我希望爸爸很快能从美国回来
I Dad the USA soon.
3 乘飞机到那儿既快捷又方便。

get there by plane.
4 现在的老人过着舒适的生活.
Now the old are enjoying
六写出下列动词的过去式和过去分词。

speak buy spend
hear swim throw
find fly drink
feel become rise
take wear write
ride hear hide
begin eat lie
give sing teach
forget sleep catch。

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